RT-10   ACR-B/2 URC-10
FSN 5821-930-0990
243 MHz Survival Radio

© Brooke Clarke, N6GCE

     Neg    16 VDC   Pos

General Information

"The RT-10 and the URC-10 are the same thing, more or less, except the URC-10 has an external battery. The URC-10 manual covers both radios.  Pulling out the antenna completes the battery circuit. There were many spin offs, RT-20, RT-60, RT-60B2. URC-4B, PRC-93, etc. . . . "        Alan Tasker

This radio can transmit and receive on 243 MHz only.

Might be in the book "SEALs in Vietnam" page 69.


The RT-10 feels very solid in your hand.  I would expect it to work after being run over by a truck.  Very similar in this respect to the PRC-90 radios.  The URC-68, although very capable is a plastic case with signs of many stress cracks, I would not trust it as much.


TM 11-5820-640-15 available on line from ETM covers the URC-10, URC-10A and RT-10.  Contains operation, theory of operation and a number of simplified and well as full schematic diagrams and exploded views.

The RT-278/URC-10 has an extension cable for the battery, probably to keep the BA-1387 Mercury battery warm in cold conditions.
The RT-278A/URC-10 has an extension cable terminating in a connector rather than the battery itself.
The RT-278B/URC-10A looks identical to the RT-10 but the URC-10A has 26 semiconductors and the RT-10 has 18 semiconductors.
The SRU-21/P Survival Vest TM 55-1680-351-10 has a little about the RT-10.


The RT-10 uses either the K308 or K308A battery.
A very old, but still unused battery is marked as follows:
Cardboard box:
Battery Dry D-308A
P/N P4-01-0008
1 each
A/   6/79   & hand written EXP 1/82
ACR Electronics, inc.
Hollywood, Florida


The battery it'self has similar markings but uses the title:  "Battery Power Supply" with no commas and shows a date code of 0679.
When installed in a TS-20 the battery tests totally dead. (Jan 2003)

AN/URM-172 Test Set  6625-832-8551

no info on this set 

Back to Brooke's PRC68Products for SaleSurvival Radios, U229 Pin Out, Audio Connectors, Military Information, Electronics, Personal Home page

This is the  time this page has been accessed since 30 Sep 2001.